also incapable of undergoing a [1,7]-sigmatropic hydrogen shift, was prepared in eight steps from the ketone 6. A stereoselective method for the preparation of 6β-vitamin D type vinylallenes was developed in this synthesis, starting from propargyl benzoate 10.
从酮6到八步制备了
CD环不饱和
维生素4,它是一个具有扰动的π系统并且不能进行[1,7]-σ氢转移的类似物。从
苯甲酸炔丙基酯10开始,开发了一种立体选择性的方法来制备6β-
维生素D型
乙烯基丙二烯。